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Have you ever heard the saying “If you want a friend, be one”? If you want to make friends with others, you should be friendly to them at first.
Here is how one ① /new teacher made friends/ with the pupils in her class on the first day of school. As the bell rang, the teacher smiled at each pupil. Then she said in a quiet voice, “Good morning. How nice it is to have all of you in my class this year. I’d like to know each of you. I am sure we will enjoy working together.” ② Her voice was sweet and her look was friendly, so everyone felt happy.
She told the pupils her name and wrote it on the blackboard. Then she told them some of the things she liked to do and she was hoping to do with them during the year. ③ Then she said to the boys and girls, “Now you know my name and the things I like and I want to know your names and the things you like. ”
Could you make friends by doing the same as this teacher did?
One way of getting to know girls and boys in your class is to find out more about them. ④People often make friends with those who have the same hobbies. You play the same games and go on journeys together. It is a good way to make friends.
1.根据①处的注音写出英语单词。
2.根据②处的划线句子在下面句子中的每个空白处填入一个适当的词(首字母已给出)。
Everyone felt happy b_______ o________ her sweet voice and her friendly look.
3.1)在③处的划线部分中找出哪个词的最后一个音可以失去爆破。
2)在③处的划线部分中找出两个可以连读的词。
4.将④处的划线句子翻译成汉语。
5.从文中找出一句能概括本文主旨大意的句子。
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(1)应用胚胎工程技术可以培育出“试管牛”。试管牛的培育需经过体外受精、 、
以及在母体中发育和产出等过程。
(2)在“试管牛”的培育过程中,要使精子和卵母细胞在体外成功结合,需要对精子进行处理,使其 。另外,培养的卵母细胞需要发育至减数第二次分裂的中期,该时期在显微镜下可观察到次级卵母细胞和 。
(3)通常奶牛每次排出一枚卵母细胞,采用激素处理可使其一次排出多枚卵母细胞,常使用的激素是 。
(4)利用基因工程可以获得转基因牛,从而改良奶牛的某些性状。基因工程的四个基本操作步骤是 、基因表达载体的构建、 和 。若要获得的转基因牛分泌的乳汁中含有人干扰素,则所构建的基因表达载体必须包括:某种牛乳腺分泌蛋白基因及其启动子、 、 、 和复制原点等。将该基因表达载体导入受体细胞所采用的方法是 (显微注射法、农杆菌转化法),为获得能大量产生人干扰素的转基因牛,该基因表达载体应导入的受体细胞是 (受精卵、乳腺细胞)。 查看习题详情和答案>>
(1)应用胚胎工程技术可以培育出“试管牛”。试管牛的培育需经过体外受精、 、
以及在母体中发育和产出等过程。
(2)在“试管牛”的培育过程中,要使精子和卵母细胞在体外成功结合,需要对精子进行处理,使其 。另外,培养的卵母细胞需要发育至减数第二次分裂的中期,该时期在显微镜下可观察到次级卵母细胞和 。
(3)通常奶牛每次排出一枚卵母细胞,采用激素处理可使其一次排出多枚卵母细胞,常使用的激素是 。
(4)利用基因工程可以获得转基因牛,从而改良奶牛的某些性状。基因工程的四个基本操作步骤是 、基因表达载体的构建、 和 。若要获得的转基因牛分泌的乳汁中含有人干扰素,则所构建的基因表达载体必须包括:某种牛乳腺分泌蛋白基因及其启动子、 、 、 和复制原点等。将该基因表达载体导入受体细胞所采用的方法是 (显微注射法、农杆菌转化法),为获得能大量产生人干扰素的转基因牛,该基因表达载体应导入的受体细胞是 (受精卵、乳腺细胞)。 查看习题详情和答案>>